Not really. Their mechanics and game knowledge is still much higher than average players but the meta was so much different back then. So a current meta would beat that team comp but not the players themselves.

AP Alistar mid was ridiculous back in the day. His ratios were roughly double his current ones with better base numbers.

Almost all of the abilities on these champs have been tweaked if not changed since then. Not to mention how strong the boots start was.

So yes, if they tried that setup on this patch, a plat team would probably win (lol Ali mid) but a plat team running a current setup on that patch would get rolled... Unreleased champs and items aside.